ive made my point a million times over yrs dealer tech always do hot oil changes win min on last drips add new oil to push out garbage caught behind threaded engine boss pour gallon solvent naphtha through to flush out as much trash as possible to determine actual cause crank over only to feel compression by finger in spark plug hole confirm was it ever on its side running cut open oil filter see what he has was there tranny issues cant be rodcrank bearing material or rod would come thru case decent view of shrapnel does look like it went between gears a few times unless its a detent spring for shifter hard to say best of luck it may not be as bad inside as thought